US 12,186,999 B2
Injection overmolding with heat/cool cycling for making optical lenses using 3D-printed functional wafers
Haifeng Shan, Shrewsbury, MA (US); Aref Jallouli, Shrewsbury, MA (US); and Hao-Wen Chiu, Holden, MA (US)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 17/623,692
Filed by Essilor International, Charenton-le-Pont (FR)
PCT Filed Jul. 1, 2020, PCT No. PCT/EP2020/068458
§ 371(c)(1), (2) Date Dec. 29, 2021,
PCT Pub. No. WO2021/001399, PCT Pub. Date Jan. 7, 2021.
Claims priority of application No. 19315053 (EP), filed on Jul. 2, 2019.
Prior Publication US 2022/0266488 A1, Aug. 25, 2022
Int. Cl. B29D 11/00 (2006.01); B29C 45/14 (2006.01); B29L 11/00 (2006.01); B33Y 80/00 (2015.01)
CPC B29D 11/0073 (2013.01) [B29C 45/1418 (2013.01); B29C 45/14778 (2013.01); B29K 2995/0031 (2013.01); B29K 2995/0073 (2013.01); B29L 2011/0016 (2013.01); B33Y 80/00 (2014.12)] 8 Claims
OG exemplary drawing
 
1. A method for producing an optical article, the method comprising over-molding an additive manufactured functional wafer having a functional wafer glass transition temperature onto a convex surface of a base lens to produce an ophthalmic lens, wherein the over-molding comprises:
affixing the functional wafer to a concave surface of an injection molding cavity;
filling the injection molding cavity with molten base lens material; and
raising the injection molding cavity temperature from a first temperature to a second temperature that is at least 10° C. less than the functional wafer glass transition temperature and up to and including 5° C. above the functional wafer glass transition temperature, such that Tg,wafer+5° C.≥Tcavity≥Tg,wafer−10° C.